Two technologies for presenting documents to humans:
  - CSS - Cascading Style Sheets (1996) 
    
      - Formatting model
- Formatting properties (fonts, colors, margins...)
 
- XSL - Extensible Style sheet Language
    
      - XSLT - XSL Transformations (1999)
 To transform an XML doc into another XML doc
- XSL-FO - XSL Formatting Objects
 Superset of CSS formatting model & properties
 
Can also specify rendering in braille & synthesized voice.